Research and Development Records (1942-52) includes a copy of John Mauchly's 1942-3 ENIAC proposal that was submitted to the U.S. Army's Ordnance Department; also included are ENIAC progress reports, laboratory noteboods, engineering drawings, and patent files. Records also document the EDVAC, BINAC, and UNIVAC projects. The EDVAC files includes a folder of letters of John von Neuman tracing his involvement with the project. BINAC records contain considerable correspondence with Northrop Aircraft which trace the technological obstacles that had to be overcome in order to build the first stored memory computer. UNIVAC design and production records describe the development of the UNIVAC system component by component i.e. card to tape feed, inputoutput circuts, unityper, and uniprinter.